I recently upgraded to the latest SWM dish and receivers. You can run one wire (that's all you CAN run) from the dish to the RV. I use the factory cable input which comes out in my AV shelf. It connects to an 8 way SWM splitter which the power inserter also plugs into which is required to power the LNB. The splitter lets you connect to your SWM receivers. I have two HD DVRs and one standard HD box I use the factory cabling to the bedroom and outside.
I really like the setup. My old HD setup used two wires from the dish to the DVR so I could record and watch. Now I can record two shows and watch three on one wire.
The dish is just as easy to setup as my old single SD. The only gotcha is to not turn on your boxes until the LNB is connected and powered up or the boxes fail power up testing.